*
1. What is DNA?
DNA stands for Deoxyribonucleic acid. The molecule that carries genetic information and found in the nuclei of cells.
2. How is DNA organized inside the cells?
It is organised in a double helix arrangement. A molecule of DNA is wrapped around proteins to form a chromatin thread, which is then coiled tightly into chromosomes inside the cell nucleus.
3. What is gene?
A gene is a small segment of DNA that contains information (instruction) to make a single protein. Each of these proteins would be responsible for a paticular characteristic of an organism.
4. What is the basic unit of DNA and what is it made up of?
The basic unit is called nucleotide. It consists of a phosphate group, a nitrogen-containing base and a sugar called deoxyribose.
5. State the rules of base pairing.
Adenine (A) always pairs with Thymine (T).
Guanine (G) always pairs with Cytosine (C).
Assignment 2:
1. Explain the process of transcription.
A part of the DNA is unzipped to reveal the template DNA strand. A part of this unzipped DNA would be copied to form a messenger RNA. This
process is known as transciption.
2. Explain the process of translation.
The messenger RNA carries the message to the cytoplasm and a ribosome helps to convert the message in the mRNA into a protein molecule. This
process is called translation.
Assignment 1:
1. Define genes
2. Define alleles
3. Define chromosomes
4. Define homologous chromosomes
5. Define heterozygous chromosome
6. Define phenotype
7. Define genotype
-Define genes
A hereditary factor borne on a particular locus in a chromosome. It controls a particular characteistic.
-Define alleles
Different forms of a gene which occupy the same relative position on a pair of homologous chromosomes.
-Define chromosomes
Coiled DNA threads are called chromatin threads or chromosomes.
-Define homologous chromosomes.
An individual who has identical alleles for a particular trait .
-Define heterozygous chromosomes
An individual who has different alleles for a particulat trait.
-Define phenotype
The expressed trait in an indicidual,e.g. outward apperances such as height and eye colour.
-Define genotype
The combination of genes in an individual.
Attempt this questions in your respective group pages.
1. What is ecology?
Ecology is the study of relationships between living organisms and the natural environment.
2. What is a habitat?
The place where an organism lives.
3. What is a population?
A group of organisms of same species living together in the same habitat.
4. What is a community?
community is a population of organisms living together and interacting with one another
under the same environmental conditions.
5. What is an ecosystem?
An ecosystem is an ecological system formed by the interaction of living organisms and their non-living
environments.
6. What is biotic environment?
The living part of an ecosystem.
7. Explain how organisms affect other organisms?
An organism in any habitat is never completely independent. it is usually dependent on other
organisms for specific reasons.
8. What is an ecological community?
an ecological community is when different populations of plants and animals live together and interact within
the same environment.
9. What is abiotic environment?
the climate and the physical features of the surrounding are part of the abiotic environment.
10. Explain how abiotic factors affect organisms.
Light intensity, temprature, amount of water available, oxygen content, salinity, pH of soil.
- Baadal Daryani
- Mohamad
*
1. What is DNA?
DNA stands for Deoxyribonucleic acid. The molecule that carries genetic information and found in the nuclei of cells.
2. How is DNA organized inside the cells?
It is organised in a double helix arrangement. A molecule of DNA is wrapped around proteins to form a chromatin thread, which is then coiled tightly into chromosomes inside the cell nucleus.
3. What is gene?
A gene is a small segment of DNA that contains information (instruction) to make a single protein. Each of these proteins would be responsible for a paticular characteristic of an organism.
4. What is the basic unit of DNA and what is it made up of?
The basic unit is called nucleotide. It consists of a phosphate group, a nitrogen-containing base and a sugar called deoxyribose.
5. State the rules of base pairing.
Adenine (A) always pairs with Thymine (T).
Guanine (G) always pairs with Cytosine (C).
Assignment 2:
1. Explain the process of transcription.
A part of the DNA is unzipped to reveal the template DNA strand. A part of this unzipped DNA would be copied to form a messenger RNA. This
process is known as transciption.
2. Explain the process of translation.
The messenger RNA carries the message to the cytoplasm and a ribosome helps to convert the message in the mRNA into a protein molecule. This
process is called translation.
Assignment 1:
1. Define genes
2. Define alleles
3. Define chromosomes
4. Define homologous chromosomes
5. Define heterozygous chromosome
6. Define phenotype
7. Define genotype
-Define genes
A hereditary factor borne on a particular locus in a chromosome. It controls a particular characteistic.
-Define alleles
Different forms of a gene which occupy the same relative position on a pair of homologous chromosomes.
-Define chromosomes
Coiled DNA threads are called chromatin threads or chromosomes.
-Define homologous chromosomes.
An individual who has identical alleles for a particular trait .
-Define heterozygous chromosomes
An individual who has different alleles for a particulat trait.
-Define phenotype
The expressed trait in an indicidual,e.g. outward apperances such as height and eye colour.
-Define genotype
The combination of genes in an individual.
Done by: Mohamed and Bobby
ECOLOGY
Attempt this questions in your respective group pages.
1. What is ecology?
Ecology is the study of relationships between living organisms and the natural environment.
2. What is a habitat?
The place where an organism lives.
3. What is a population?
A group of organisms of same species living together in the same habitat.
4. What is a community?
community is a population of organisms living together and interacting with one another
under the same environmental conditions.
5. What is an ecosystem?
An ecosystem is an ecological system formed by the interaction of living organisms and their non-living
environments.
6. What is biotic environment?
The living part of an ecosystem.
7. Explain how organisms affect other organisms?
An organism in any habitat is never completely independent. it is usually dependent on other
organisms for specific reasons.
8. What is an ecological community?
an ecological community is when different populations of plants and animals live together and interact within
the same environment.
9. What is abiotic environment?
the climate and the physical features of the surrounding are part of the abiotic environment.
10. Explain how abiotic factors affect organisms.
Light intensity, temprature, amount of water available, oxygen content, salinity, pH of soil.
Done by: Mohamed
Baadal Daryani
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